From d09964c625cf45ed1ed5bca983d71e5dd7030803 Mon Sep 17 00:00:00 2001
From: Jason Zaugg <jzaugg@gmail.com>
Date: Mon, 15 Feb 2016 14:20:08 +1000
Subject: [sbt] Allow system properties to override entries in verions.props

---
 project/VersionUtil.scala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'project')

diff --git a/project/VersionUtil.scala b/project/VersionUtil.scala
index fab22e66d4..6c8aebf74f 100644
--- a/project/VersionUtil.scala
+++ b/project/VersionUtil.scala
@@ -115,7 +115,9 @@ object VersionUtil {
     val in = new FileInputStream(file("versions.properties"))
     try props.load(in)
     finally in.close()
-    props.asScala.toMap
+    props.asScala.toMap.map {
+      case (k, v) => (k, sys.props.getOrElse(k, v)) // allow system properties to override versions.properties
+    }
   }
 
   /** Get a subproject version number from `versionProps` */
-- 
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